Attitude Test Narrative
Twenty students are given an attitude test before and after viewing a motion picture designed to change their attitudes favourably toward a new curriculum. A high score indicates a favourable attitude and a low score indicates an unfavourable attitude, with the scores ranging from 1 to 30. This will use the sign test on the data given below to see if we can conclude the motion picture was successful in improving attitudes. 
-Refer to Attitude Test Narrative. State the null and alternative hypotheses.
Definitions:
Residual Income
The amount of income that an investment or project generates above the minimum rate of return.
Residual Income
The profit left over after all necessary capital expenses are subtracted from the operating income, serving as an indicator of financial success.
Operating Assets
Resources used in the day-to-day functioning of a business that contribute to generating revenue.
Residual Income
The amount of income that exceeds the minimum return expected from a particular investment or operation.
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